Yuanqi Cai, Xiangyu Shi, Yinquan Huo, Yang Liu,
... that the annual average power of the C-WEC using tuning control can be up to 29.8 kW, an increase of 67.4% compared to the WEC with a constant natural period. The experimental results ...
Tópico(s): Fluid Dynamics and Vibration Analysis
2022 - Elsevier BV | Ocean Engineering
Ivana Martić, Nastia Degiuli, Carlo Giorgio Grlj,
... show that the capacity factors of the downscaled WECs increase significantly at their optimum scales, reaching about 29 % and 42 % for the AquaBuoy and Pelamis, respectively, depending on the location. By comparing the results obtained for the AquaBuoy and Pelamis at a scale of 0.7 with the results of a full-scale Lysekil WEC, it may be concluded that the downscaled WECs ...
Tópico(s): Maritime Transport Emissions and Efficiency
2024 - Elsevier BV | Energy
Murat Gökçek, Mustafa Serdar Genç,
... the LCOE varies in the range of 0.29–30.0 $/kWh for all WECS considered.
Tópico(s): Energy Load and Power Forecasting
2009 - Elsevier BV | Applied Energy
Ming Tan, Yuhao Cen, Yuxuan Yang, Xiaodong Liu, Yulin Si, Peng Qian, Dahai Zhang,
... Sea. The results indicate that the multi-axis WEC can absorb up to 5 kW and the efficiency can reach up to 29% at the most energetic site Shengshan. In addition, considerable differences of mean absorbed power efficiency can be found between sea states. 1 INTRODUCTION In the last few decades, a wide variety of wave energy technologies based on different working principles was proposed and developed. Recent reviews can be found in [1]. Among them, point absorber WECs that possess small dimensions relative to the incident ...
Tópico(s): Mechanical stress and fatigue analysis
2021 - Institution of Engineering and Technology | IET Renewable Power Generation
Produção Nacional
Revisado por pares
Caroline Portela Peruzzi, Sabrina Nascimento, Bruna Gauer, Jéssica Nardi, Elisa Saüer, Gabriela Göethel, Larissa Vivan Cestonaro, Nuryan Fão, Shanda Cattani, Cristiane Paim, Jorge Alan de Souza, Daniela Gnoatto, Solange Cristina García,
... this study were occupationally unexposed workers (OUW, n = 29) and workers exposed to crystalline silica (WECS), composed by miners, which were divided into two ...
Tópico(s): Neutrophil, Myeloperoxidase and Oxidative Mechanisms
2018 - Springer Science+Business Media | Environmental Science and Pollution Research
L.F. Le Jambre, Sonja Dominik, SJ Eady, John Henshall, Ian G. Colditz,
... equation: WECestimated = (WECobserved/(34.21 − 5.15 FCS)) × 29.06. This equation estimates for samples with FCS > 1 the WEC that would be expected if the samples were ...
Tópico(s): Agriculture Sustainability and Environmental Impact
2007 - Elsevier BV | Veterinary Parasitology
A.F. Colvin, Ian Reeve, Lyndal J. Thompson, Lewis Kahn, R.B. Besier, Stephen W. Walkden‐Brown,
... and 2018 than in 2003 (2003:48%, 2011: 29%, 2018: 37%). Time of year, results from WEC and seasonal weather condition were the most important ...
Tópico(s): Helminth infection and control
2021 - Elsevier BV | Veterinary Parasitology Regional Studies and Reports
... years and up to 217 137 animals with wec recorded in at least one of four ages (W = weaning, P = post weaning, Y = yearling, H = hogget). The heritability estimates ranged from 0.16 ± 0.01 for Ywec to 0.29 ± 0.01 for Wwec, with generally high genetic correlations between the ages. Bivariate analyses estimated genetic correlations between wec at the various ages and growth, carcass quality, ...
Tópico(s): Animal Behavior and Welfare Studies
2016 - CSIRO Publishing | Animal Production Science
Liwen Yang, Lingjuan Ye, Yuanqing Xia, Yufeng Zhan,
... five algorithms on average by 41.33%, 33.29%, 96.88%, 86.37% and 14.36% in terms of WEC.
Tópico(s): Scientific Computing and Data Management
2022 - Elsevier BV | Future Generation Computer Systems
Jeongrok Kim, Hyuck-Min Kweon, Weon Mu Jeong, Il‐Hyoung Cho, Hong-Yeon Cho,
... 274 E°) from May 1, 2002 to March 29, 2005 were used as the input wave spectrum for the performance estimation of the dual-buoy WEC. The suggested WEC, a point absorber type, consists ...
Tópico(s): Earthquake and Tsunami Effects
2015 - Elsevier BV | International Journal of Naval Architecture and Ocean Engineering
Haitao Shi, Hong Zeng, Mei Wang, Jiong Jiang, Sumei Sha, Fenrong Chen, Yan Wang, Yan Cheng, Shiyang Ma, Xin Liu,
... mean difference = 16.4%; 95% CI: 3.0-29.8%) and WEC (93.1% vs. 75.0%; mean difference = 18. ...
Tópico(s): Inflammatory Bowel Disease
2023 - Karger Publishers | Digestive Diseases
Shixiong Fan, Weiwei Ma, Tee C. Lim, B.W. Williams,
... LCC resonant converter is a feasible option for WECS. 7 Appendix The LCC resonant converter input–output voltage transfer function is (26) The resonant frequency is (27)where (28) The ratio of parallel to series capacitances is (29) The loaded quality factor is (30) For a ...
Tópico(s): Wind Turbine Control Systems
2013 - Institution of Engineering and Technology | IET Renewable Power Generation
C. Zanfi, S. Colombini, Federico Mason, G. Galassi, L. Rapetti, L. Malagutti, G. M. Crovetto, M. Spanghero,
... pH was lower (P < 0.05) for the WECS diets than the control diet (7.10 and 7.00 vs. 7.40) and for the sampling at 150 kg BW than that at 130 and 110 kg BW (6.96 vs. 7.29 and 7.24). At slaughter, lean percentage in the carcass was lower in the 30WECS diet than those of the other 2 diets (46.8% vs. 48.3% and 48.6%, P = 0.05). The overall experimental data obtained in both trials indicate that substitution of wheat bran and corn meal for WECS (up to 30% of DM) does not affect, ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
2013 - Oxford University Press | Journal of Animal Science
... first case depends on the place where the WEC is located, while the other two can be modified and optimised in the mechanical design and sizing of the buoy and the choice of load connection and generator type [29]. The power output of the SWE unit may ...
Tópico(s): Islanding Detection in Power Systems
2020 - Institution of Engineering and Technology | IET Electric Power Applications
Bukola Babatunde Adetokun, Christopher Maina Muriithi, Olorunfemi Ojo,
... of the study system increases with increasing DFIG-WECS power penetration up to 100%. However, the overloading effects on critical transmission lines presents a definitive limit to the allowable practical penetration level, which is determined to be 28.06%. This limit can be improved to 29.88%, 46.3% and 52.23% by Thyristor- ...
Tópico(s): Power System Optimization and Stability
2020 - Elsevier BV | International Journal of Electrical Power & Energy Systems
Vinit Kumar Singh, B.V. Suryakiran, Ashu Verma, T. S. Bhatti,
... diameter and a cubic of the wind speed [29]. The generator and converters are two important electrical constituents of WECS with fixed type or variable type arrangement located ...
Tópico(s): Smart Grid Energy Management
2021 - Institution of Engineering and Technology | IET Energy Systems Integration
Shangyan Zou, Bryson Robertson, Aeron Roach, Timothy Mundon, Brian Rosenberg, Markel Peñalba,
... Triton reduces CoV by up to 37%); (b) WECs notably impact the wave field (e.g., RM3 up to 14%, RM5 up to 39%, Triton up to 29% diffraction); (c) Wave refraction, alongside attenuation, is crucial, ...
Tópico(s): Coastal and Marine Dynamics
2024 - Elsevier BV | Renewable Energy
Talha A. Taj, Hany M. Hasanien, A.I. Alolah, S. M. Muyeen,
... energy storage system’. American Control Conf. (ACC), 27–29 June 2012, pp. 3026– 3031 18Kairous, D., Wamkeue, R., Belmadani, B.: ‘ Sliding mode control of DFIG based variable speed WECS with flywheel energy storage’. XIX Int. Conf. on ...
Tópico(s): Power Systems and Renewable Energy
2015 - Institution of Engineering and Technology | IET Renewable Power Generation
Fernando D. Bianchi, Ricardo J. Mantz, C.F. Christiansen,
Tópico(s): Microgrid Control and Optimization
2004 - Elsevier BV | Renewable Energy
Jin Woo Choi, Shin Young Heo, Mun-Kyeom Kim,
... charge/discharge using the BESS are to stabilise WECS operation and create suitable management of energy storage, thereby maintaining a balance between the wind power and load demand. Reliable BESS operation is required such that the battery should be neither completely discharged nor overcharged. Thus, the BESS must be kept within the proper SOC levels to ensure the battery lifetime [29]. According to the load profiles, BESS operation can ...
Tópico(s): Microgrid Control and Optimization
2015 - Institution of Engineering and Technology | IET Generation Transmission & Distribution
Amelia Barcellini, Francesca Dal Mas, Paola Paoloni, Pierre Loap, Lorenzo Cobianchi, Laura D. Locati, María Rita Rodríguez‐Luna, Ester Orlandi,
... new consultation in EECs versus 45 min in WECs). In a comprehensive survey on 93 countries, 66 (71%) exceeded the optimal international standard of 150-175 annual caseload per medical oncologist.26Mathew A. Global survey of clinical oncology workforce.J Glob Oncol. 2018; 4: 1-12Google Scholar Alarmingly, in 39 (42%) countries, an oncologist would provide care for >500 patients with cancer, and in 27 (29%) countries (of which 25 in Africa and 2 ...
Tópico(s): Palliative Care and End-of-Life Issues
2021 - Elsevier BV | ESMO Open
Surendra Singh, Amin Nouri, Shikha Singh, Saseendran S. Anapalli, Jaehoon Lee, Prakash R. Arelli, Sindhu Jagadamma,
... of 465 (NTWD) ≥418 (NTW) >252 (MP). The WEC and RC fractions did not differ among treatments. Across the treatments, the greatest aggregate-associated SOC concentration was found in microaggregates (0.053–0.25 mm) and the lowest in clay- and silt-size particles (<0.053 mm). Additionally, WAS under NT systems was significantly higher (45.5–52.3 %) than under tilled treatments (21.9–29.1 %). Total SOC correlated significantly with POXC (r = ...
Tópico(s): Soil and Unsaturated Flow
2019 - Elsevier BV | Soil and Tillage Research
Bidyadhar Subudhi, Pedda Suresh Ogeti,
... wind speed range’, IEEE Trans. Energy Convers., 2014, 29, 1, pp. 259 – 266 (doi: https://doi.org/10.1109/TEC.2013.2294212) 7Muhando E.B., Senjyu T., Uehara A., Funabashi T.: ‘Gain-scheduled H∞ control for WECS via LMI techniques and parametrically dependent feedback part ...
Tópico(s): Multilevel Inverters and Converters
2016 - Institution of Engineering and Technology | The Journal of Engineering
... 4-N respectively varies within 0.078～0.29/d and 0.087～0.3/d,and the minimums synchronously appear in dry winter season(Nov.,Dec.,Jan.).Annual WEC of CODMn and NH+4-N for studied ...
Tópico(s): Water Quality and Pollution Assessment
2007 - Soil and Water Conservation Society | Journal of Soil and Water Conservation
This paper describes the innovative offshore point-absorber wave energy converter (WEC), IRWEC1, under development by the Hydrodynamics, Acoustics and Marine propulsion Group at Babol Noshirvani University of Technology. Totally enclosed in an outer shell, with no external moving parts, IRWEC1 is completely sealed which make it a robust and trustable system. Important motion for this WEC is the pitch motion, so, a pendulum is designed for transferring this motion to the PTO. In this paper, the WEC ...
Tópico(s): Wave and Wind Energy Systems
2016 - Materials and Energy Research Center | International journal of engineering. Transactions C: Aspects
C. Vilar, Hortensia Amarís, Julio Usaola,
Wind Energy Conversion Systems (WECS) produce fluctuating output power, which may cause voltage fluctuations and flicker. Flicker assessment in networks may be difficult, since its evaluation requires long computing time and special procedures to calculate the flicker severity index, Pst. A frequency domain method to study flicker propagation is presented. This method is based on propagation of frequency components from WECS output currents throughout the grid. In this way, a fast flicker analysis ...
Tópico(s): Power Systems and Renewable Energy
2002 - Institute of Electrical and Electronics Engineers | IEEE Power Engineering Review
Alireza Ashouri‐Zadeh, Mohammadreza Toulabi, Ali Mohammad Ranjbar,
... studied separately for large class of problems [27-29]. 6.1 Main speed controller performance verification As the first case study, it is assumed that the wind speed increases from 6 to 15 m/s with a constant acceleration (Fig. 7a). Fig. 7b illustrates the output power of WECS versus its rotor angular speed for different wind ...
Tópico(s): Wind Energy Research and Development
2016 - Institution of Engineering and Technology | IET Renewable Power Generation
Bingyong Guo, Siming Zheng, John V. Ringwood, J.C.C. Henriques, Dahai Zhang,
... that the absorbed power by the multi-axis WEC is up to 5 kW. The efficiency up to 29% is reported at the most energetic site of Shengshan. Kurniawan et al., in their paper 'Numerical simulation of parametric resonance in wave energy converters using simplified models', present a computation-efficient and simplified method to simulate non-linear parametric resonance in WECs. Different from the non-linear Froude-Krylov method, ...
Tópico(s): Wave and Wind Energy Systems
2021 - Institution of Engineering and Technology | IET Renewable Power Generation
WEC without control traps energy only from the wave components whose frequency lays in the band of the natural frequencies of the system.Nevertheless, this system is potentially able to catch
Tópico(s): Coastal and Marine Dynamics
2016 - | International Journal of Marine Science and Ocean Technology
Budi Azhari, F. Danang Wijaya,
Linear permanent magnet generator (LPMG) is an essential component in recent wave energy converter (WEC) which exploits wave’s heave motion. It could be classified into tubular-type, flat-tricore type, and quasi-flat type. In previous researches, these three models have been studied and designed for pico-scale WEC. Design optimization has further been conducted for flat-tricore LPMG, by using simulated annealing (SA) algorithm. It modified some parameters to minimize the resulted copper loss. This ...
Tópico(s): Electric Motor Design and Analysis
2019 - Indonesian Institute of Sciences | Mechatronics Electrical Power and Vehicular Technology